Map project ties together centuries of Toronto history

Imagine standing at the corner of Queen and Bay and being able to fast-forward through time from 1818 right up to present day. Two city halls, polar opposites in terms of design, would appear before your eyes, the mighty Eaton's department store empire would proliferate and crumble, and rows of industrial buildings would give way to luxury hotels and bank buildings.

Chris Olsen, a professional cartographer based in Redlands, California, has made that dream a reality with a gorgeous interactive map application. Released earlier this month, the Google Maps-style interface lets users explore maps of Toronto that date back almost two centuries.

The result is a timeline of maps from 1818 to 1924 with aerial views from 1947 and 2012. The maps Olsen used for 1889, 1913, and 1924 were prepared for insurance underwriters and printed as 59 separate plates.

Zoom out far enough and the patchwork is visible due to minor variances in colour and tone.

"The most time consuming part is putting the maps together because you're starting with just the pure image itself," Olsen says. It took about to six months to stitch the pieces together, make the map searchable, and work out numerous tiny inaccuracies, he says.

"Everything that I've done is out-of-the-box, there's no customizing or smoke and mirrors or anything like that."

The attention to detail is remarkable: Each map has been rotated to true north, which puts Toronto's streets at their correct oblique angle, and synchronized with an address search function. It's possible to find a location and adjust the slider to see how the neighbourhood evolved.

Its neat to see the Sunnyside, Queen, and High Park area evolve from little pond, to housing, to be replaced by The Queensway. Indian Road used to be THE road connecting with Lake Shore Blvd., then having a fork in the road with Keele Street, then the connection disappearing entirely.

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